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Robertson, S.E.: Some recent theories and models in information retrieval (1980) 0.01

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Source: Theory and application of information research. Proc. of the 2nd Int. Research Forum on Information Science, 3.-6.8.1977, Copenhagen. Ed.: O. Harbo u. L. Kajberg

Robertson, S.E.: On relevance weight estimation and query expansion (1986) 0.01

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Theme: Semantisches Umfeld in Indexierung u. Retrieval